Writing instrument



FIG. 1 is a left side elevation of a writing instrument in accordance with the present invention;

FIG. 2 is a front elevation of the writing instrument of FIG. 1;

FIG. 3 is a rear elevation of the writing instrument of FIG. 1;

FIG. 4 is a bottom plan view of the writing instrument of FIG. 1;

FIG. 5 is a top plan view of the writing instrument of FIG. 1;

FIG. 6 is a top perspective view of the writing instrument of FIG. 1; and,

FIG. 7 is a left side elevation of the design of FIG. 1 shown shaded for color. 

I claim the ornamental design for a writing instrument, as shown. 